DNA Marker Index information for Chromosome: M Marker: C340TNames and Aliases for this DNA Marker: C340T, C340, i4000518, rs117394573.Chromosome Position in hg38 Human Genome assembly1: 340.Chromosome Position in hg19 assembly2: 340 .Ancestral marker allele value: C.Derived, alternative, or mutated marker allele value: T.